> 5 сент. 2017 г., в 14:04, Michael Paquier <michael.paqu...@gmail.com> > написал(а): > >> For example, in archive_command we put WALs for archiving from >> pg_xlog/pg_wal into another directory inside PGDATA and than another cron >> task makes real archiving. This directory ideally should be skipped by >> pg_rewind, but it would not be handled by proposed change. > > I would be curious to follow the reasoning for such a two-phase > archiving (You basically want to push it in two places, no? But why > not just use pg_receivexlog then?). This is complicated to handle from > the point of view of availability and backup reliability + durability.
We do compress WALs and send them over network. Doing it via archive_command in single thread is sometimes slower than new WALs are written under heavy load. -- May the force be with you… https://simply.name
